Muffler.



' PATENTED JULY 1l, 1905. P. J. L G.- J. IHRIG.

MUFFLBR. V APPLICATION FILED MAY6,1904.

G60??? cf 17172,@

UNITED STATES Patented July 11, 1905.

PATENT OEEICE.

PETER J. IHRIG AND GEORGE J. IHRIG, OF SPRINGFIELD, OHIO.

NIUFFL'ER.

SPECIFICATION forming part of Letters Patent No. 794,226, dated July 11,1905.

Application Bled May 6, 1904. Serial No. 206,624-

To all whom, it may 0077/067172:

Be it known that we, PETER J. IHRIG and GEORGE J. II-IRIG, citizens ofthe United States, residing at Springfield, in the county of Clark andState of Ohio, have invented certain new and useful Improvements in Gas-Engine Mufflers, of which the following is a specification, referencebeing had therein to the accompanying drawings.

` the discharge-mouth of the branch 3.

This invention relates to gas-engine mufflers, and is in the generalnature of an improvement upon the construction set forth in UnitedStates Letters Patent No. 718,131, granted January 13, 1903, to GeorgeJ. Ihrig and Ernest C. Ihrig as assignees of Joseph F. Kurtis and HermanF. Miller.

Ihepresent invention has for its object to simplify the construction andat `the same time increase the eiliciency of the device.

To these ends our invention consists in certain novel features, which wewill now proceed to describe and will then particularly point out in theclaims.

In Figure 1 of the accompanying drawings is shown a central sectionalview of a structure embodying our invention in one form and in Fig. 2 asimilar view in another form.

In the said drawings, 1 indicates the exhaust-pipe, to which is secureda T-shaped coupling 2, having a branch 3, which is connected with theexhaust-pipe, and two other branches 4 and 5, arranged at right anglesto the branch 2 in alinement with each other and extending in oppositedirections. At the point where the three members of the part 2 unitethere is located a conical deflector 6, having its central axis arrangedin line with the inlet branch 3 and serving to divide the exhaust anddirect it into the branches 4 and 5 at the same time preventing thenoise which would otherwise arise from the shock of the discharge of theexhaust if the branches 4 and 5 were continuous and presented a wall atright angles to The branches 4 and 5 are connected by pipes 7 and 8 andby right-angled bends 9 and 10 with two parallel outlet-pipes 11 and 12,provided, respectively, with exhaust-heads 13 5oand 14. As theconstruction of these two exhaust-heads is similar, we will describeonly one of them in detail, it being understood that the samedescription is equally appli- The central portion of the plate 18 isformed p into a rentrant conical boss 20, which eX- tends into theinterior of the bowl and forms a deilecting-cone, its sides beingpreferably curved, as shown in cross-section, this sectional curvatureof the cone being the reverse of the sectional curvature of the bowlhereinbefore referred to. The space within the bowl between the bodythereof and the cone 20 is occupied by a series of diaphragms 21,constructed substantially as set forth in the prior Letters Patenthereinbefore referred to, having their alternate inner and outer marginsprovided with openings 22, formed by slitting the material and bendingthe tongue thus formed at right angles to the diaphragms to formdeflecting-plates 23, which also serve to space the diaphragms apart. 24indicates a conical deflecting boss or cone formed integrally with thebowl 15, to which it is connected by suitably-spaced webs orbridge-pieces or otherwise secured in position within the said bowl, itslocation being immediately in front of the cone 20 and extending intothe inlet-opening 16 of the head.

25 indicates a cup-shaped cap or closure extending over the outer end ordischargemouth of the bowl, which is provided with a seat 26 to receivethe plate 19 and cap 25. A bolt 27 extends through the cones 24 and 20and through the cap 25 and receives on its threaded outergend, whichprojects beyond said cap, a nut 28, by means of which the cone 24, cap25, plate 19, and diaphragms or baffle-plates are all clamped inposition within the bowl.

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It will be observed that the products of 1. are noiselessly dcHectedinto two diverging pipes or conduits, each of the same area as theexhaust-pipe, thereby permitting the exbranches being of a diametersubstantially equal to that of the exhaust-pipe beyond their point ofdivergence, parallel outletpipes connected with the (ilischarge branchesof' said fitting, and separate exhaust-heads haust to expand, andconsequently reducing mounted on the discharge ends of said outlet,

its pressure and noise-producing capacity. This latter characteristic isstill further reduced by the passage of the exhaust through the pipes 7and 8, around the bends 9 and l0, and through the outlet-pipes 11 andl2. The divided exhaust therefore reaches the exhaust-heads 13 and 14with a pressure considerably reduced.

Passing through these l l l l .heads the exhaust-gases, by reason oftheir retardation and subdivision and their passage successivelyT intospaces of' increasing capacity, are Vfinally discharged in a practicallynoiseless manner. It will be noted that the construction is muchsimpler, and consequently less expensive, than the structure set forthin the prior patent hereinbe'fore referred. to, and we have found inpractice that a material gain in efficiency for the purposes sought tobe accomplished is effected.

fe do not wish to be understood as limiting ourselves strictly to theprecise details of construction hereinbefore described, and shown in theaccoinpanyii'ig drawings, as the same may obviously be modified withoutdeparting 'from the principle o 'l our invention. For instance, and asshown in Fig. 2, one of. the exhaust-heads may be connected directlywith the exhaust-pipe 1 in the case of use with small engines. Theconstruction of the head is such that when the engine is small theexhaust will be discharged in a practicallynoiseless m anner, but in thecase of engines where the shock o'l the exhaust is great then the dualarrangement becomes necessary to obtain the desired results, one of thepeculiarities of operation in that ease being the subdivision of theexhaust into branches.

Having thus 'fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

l. In a muffler, the combination, with an exhaust-pipe, of a pluralityof outlet-pnaes of substantially the same diameter as the cxhaust-pipebeyond their divergence therefrom, connected with said exhaust-pipe andeach provided with. a separate exhaust-head discharging independentlyinto the atmosphere, substantially as described. A

2. In. a muffler, the combination, with an exhaust-pipe, o'l a T-shapedVfitting connected therewith by one of its branches, its other branchesextending in opposite directions, said fitting having a deflecting-conelocated between the two last-mentioned branches opposite theoutlet-mouth of the branch which 1s connected to the exhaust-pipe, allolf said substantially as described.

3. In a muffler, the combination, with an exhaust-pipe, of a T-shapedfitting connected therewith by one of its branches, its other branchesextending in opposite directions, said `fitting having a deflecting-conelocated between the two last-mentioned branches opposite theoutlet-mouth of the branch. which is connected to the exhaust-pipe, allof said branches being of' a diameter substantially equal to that of theexhaust-pipe beyond their point o'l" divergence, parallel outlet-pipesconnected with the discharge branches ol' said fitting, and separateexhaust-heads mounted on the discharge ends of.2 said outlet-pipes, eachexhaust-head comprising a bowl-shaped body having relatively large andsmall openings at its opposite ends, a plate extending across the outletend, provided with outletopenings, and having a central deflecting-coneextending into the bowl, baffle-plz'ttes fitted at intervals between thesaid d effecting-cone and bowl, a second deflecting-cone extending intothe inlet-opening of the bowl, and an outer perforated cap or closure ofcup-like ferm, substantially as described.

4. In a muffler, the combination, with an exhaust-pipe, of anexhaust-head comprising a bowl-shaped body vhaving relatively large andsmall openings at its opposite ends, a plate extending across the outletend, provided with. outlet-openings, and having a centraldeflecting-cone extending into the bowl, and baffle-plates within thebowl, substantially as described.

5. In a muffler, the combination, with an exhaust-pipe, of anexhaust-head comprising a bowl-shaped body having relatively large andsmall openings at its opposite ends, a plate extending across the outletend, provided with outlet-openings, and having a central deflecting-coneextending into the bowl, bafflelates Vfitted at intervals between thesald. deflecting-cone and bowl, a second defleeting-cone extending infothe inlet-opening of the bowl, and an outer perforated cap or closure ofcup-like form, substantially as described.

In testimony whereof' we affix our signatures in presence of twowitnesses.

PETER J. IIIRIG. GEORGE J. IH'RIG.

flfitiiesses i E. O. HAGAN, F. W. Sor-merma.

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